Just a quick one. Apparently a simple issue. I wanted to completely un-mount an iSCSI Datastore on just one ESXi host in a Cluster. In case you wonder why, the answer is “for testing purposes”.
The vSphere Client has an option to accomplish this task. Select the desired Datastore, right-click and select “Unmount” from the menu. After a few moments, the affected Datastores disappears from the overview. Now select the “Devices” view and you will notice that the device is still there. Select “Properties” and “Manage Paths..” and connections are still there.
I have tried quite a few things to completely remove all traces. Fortunately there is a simple solution. Just perform the following steps, you do not need to perform the unmount procedure.
The first step is to remove the ESXi host from the access list. This depends on the shared storage solution. In this example an Equallogic series. Select the Volume, go to the “Access” tab and remove the ESXi host from the list.